header {
  position: relative;
  height: 120px;
  width: 100%;
  .img_logo {
    position: absolute;
    top: 25px;
    left: 350px;
    height: 80px;
    width: 200px;
  }

  div {
    position: absolute;
    top: 35px;
    right: 320px;
    width: 180px;
    height: 50px;
    .img_header {
      position: absolute;
      top: 10px;
      left: 0;
      width: 30px;
      height: 30px;
    }
    h3 {
      position: absolute;
      top: 18px;
      right: 2px;
      font-size: 14px;
      font-weight: 400;
    }
  }
}
* {
  padding: 0;
  margin: 0;
  box-sizing: border-box; 
}
a {
  text-decoration: none; 
  color: #000;
}
input {
  outline: none;
  height: 45px;
  width: 300px;
  padding-left: 15px;
  color: #999;
  margin: 20px 0;
  border-radius: 10px;
  border: 1px solid #999;
  font-size: 18px;
}
.search_input {
  width: 350px;
  height: 55px;
  margin-top: 35px;
  border-radius: 30px;
  border: 2px solid #FF471D;
}
.search_btn {
  position: absolute;
  cursor: pointer;
  top: 35px;
  right: 690px;
  border: 0;
  height: 55px;
  width: 120px;
  border-radius: 30px;
  font-size: 20px;
  color: #fff;
  background-color: #FF471D;
}
li {
  list-style-type: none;
}
.heder_div {
  height: 30px; 
  width: 1200px; 
  margin-left: 330px;
  padding-top: 3px;
  .heder_div_a {
    margin-left: 25px;
    float: right;
  }
}